COLD ENGINE VALVE TAP WENT AWAY!
I have a 1999 Chevy with a 2.2 engine 130,000 mi, that does not burn oil.
The engine had a valve tap when cold. I changed the oil and added Marvel Mystery Oil.
Most of it to the oil, and a few ounces to the gas tank.
The valve tap went away after about 500 miles! At 700 miles, I had the oil changed again.
As winter set in, the valve tap, if and when it tapped… was much quieter.
Most often, there was no hydraulic lifter noise at all, even at 20 degree temperatures!
My mechanic explained how a lifter noise can come and go.
He said there are two positions the crankshaft can stop in.
When an odd cylinder comes to the compression stroke, or when an even numbered cylinder does.
When the engine spends all night compressing a particular lifter it can cause a valve tap in the morning.
If you search on the web the ingredients of MMO are not that mysterious.
But there’s no point in trying to figure out the proportions, when the price is right… and the product is proven…
This is the most logical use of this product, and it can get results. No additive is a miracle.
I wrote this as a testimonial when I first registered here. Now at 156,000 miles the lifter is still quiet.
(It wasn’t easy to get the photo down to 600 x 800 but I managed with free Picasa,
and moved it to the desktop so I could find it and upload it.)